IRR BIA RTE 4178 over Drainage Canal
FairSan Juan County, New Mexico · 8KM East of Nm RTE 371 · Structure no. 0000N48796B0821
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 55 ft
- 1 main span
- Daily traffic
- 100
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 4178 over Drainage Canal is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 4178 over Drainage Canal in San Juan County, New Mexico. It was built in 1980, so it is 45 years old, younger than the New Mexico average of 51.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 2,043 by 150. The structure is 55 ft (16.7 m) long and 27 ft wide. If it were closed, the detour would be 2.5 mi (4 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 4178 over Drainage Canal built?
It was built in 1980, making it 45 years old in 2025.
What condition is IRR BIA RTE 4178 over Drainage Canal in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.
How much traffic does IRR BIA RTE 4178 over Drainage Canal carry?
About 100 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 4178 over Drainage Canal?
The structure is 55 ft (16.7 m) long with a longest span of 51 ft (15.6 m) and a deck 27 ft wide.
Who owns IRR BIA RTE 4178 over Drainage Canal?
It is owned by the Bureau of Indian Affairs.